document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1026192>Question 1026192</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The currrent, I0 (measured in amperes), decreases to I amperes after t seconds according to the formula I = I0e&#8722;0.51t. When 25 amperes decreases to 2.5 amperes, the equation is 2.5 = 25e&#8722;0.51t. Rounded to the nearest tenth of a second, how long, t, does it take for the current to decrease from 25 amps to 2.5 amps? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641523 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=641523\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I+=+I%5B0%5De%5E%28-0.51t%29 ALIGN=MIDDLE  ALT=\"I+=+I%5B0%5De%5E%28-0.51t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "When <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I%5B0%5D+=+25 ALIGN=MIDDLE  ALT=\"I%5B0%5D+=+25\"   DISABLED_style= \"max-width:90%; height:auto;\" > and I = 2.5, we have <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2.5+=+25e%5E%28-0.51t%29 ALIGN=MIDDLE  ALT=\"2.5+=+25e%5E%28-0.51t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. \r<BR>\n" );
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document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e%5E%280.51t%29+=+25%2F2.5+=+10 ALIGN=MIDDLE  ALT=\"e%5E%280.51t%29+=+25%2F2.5+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "==> 0.51t = ln10 ==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+ln10%2F0.51+=+4.5 ALIGN=MIDDLE  ALT=\"t+=+ln10%2F0.51+=+4.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >seconds.\r<BR>\n" );
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